“Much of Mr. Adelson’s casino profits that go to him come from his casino in Macau, which says that obviously, maybe in a roundabout way foreign money is coming into an American political campaign,” McCain said in an interview on PBS’s News Hour.

English: Photo of Sheldon Adelson, chairman of Las Vegas Sands and Hong Kong-listed subsidiary Sands China. Photo taken 19 June 2010 in Hong Kong at a press conference held at the Four Seasons Hotel, following China Sands AGM. (Photo credit: Wikipedia)

“That is a great deal of money, and we need a level playing field and we need to go back to the realization… that we have to have a limit on the flow of money and corporations are not people,” he said.

Adelson announced Thursday he would be giving $10 million to the pro-Romney Super PAC Restore Our Future, and reports stated his future contributions to pro-Romney groups could be “limitless.”

The issue of foreign money finding its way into presidential politics comes up each cycle. In 1996, the Clinton administration was engulfed in a huge Chinese political funding controversy known at the time as “Chinagate,” whereby agents of China funded Democratic political organizations. 22 were convicted of felonies and many were associates of Bill Clinton and Al Gore.